本研究著重於鈉離子電池正極NASICON結構材料磷酸釩鈉與氟化磷酸釩鈉之合成與特性研究，並比較二者之間的差異。實驗分別以抗壞血酸、檸檬酸作為NVP與NVPF的中孔碳包覆前驅物，以溶膠-凝膠法合成樣品。X光繞射搭配Topas軟體進行晶體結構精算，NVP之a軸為8.7336 Å、c軸長為21.8370 Å；NVPF之a軸為9.0396 Å、c軸長為10.7544 Å。SEM、TEM所觀察之NVP粒徑為100-200nm；NVPF為1-2μm。搭配BET比表面積與孔徑分析儀測得NVP比表面積為27 m2/g、孔洞大量分佈之直徑為4nm；NVPF比表面積為18 m2/g、孔洞大量分佈之直徑為4nm。化性方面，配合拉曼光譜測得Asp3/Asp2值，NVP為0.26、NVPF為0.35。TGA熱重分析測得NVP與NVPF之碳包覆量分別為，6.5wt%、6.8 wt%。
　　本實驗之NVP於3.4V具有單一充放電平台，比容量為94 mAh/g (理論容量117.6 mAh/g)，而NVPF則具有三充放電平台，分別為(A)3.35V/3.41V、(B)3.67V/3.71V、(C)4.22V/4.15V，其容量可達127.68mAh/g (理論容量為128 mAh/g)，最後證實氟化後之NVPF有較好的電化學性能。

This study was focused on the synthesis and characterization of NVP and NVPF, and found the differences between them. In this study, ascorbic acid and citric acid were used as the mesoporous carbon-coated precursors of NVP and NVPF, respectively. The samples were synthesized by sol-gel method. X-ray diffraction with Topas software for crystal structure refinement, the lattice constant of NVP which a-axis was 8.7336 Å, c-axis was 21.8370 Å; the lattice constant of NVPF which a-axis was 9.0396 Å, c-axis was 10.7544 Å. SEM, TEM help us observe the NVP particle size which was 100-200nm; NVPF was 1-2μm. With the test of BET, the specific surface area of the NVP was 27 m2/g, the diameter of the pores was 4nm, the specific surface area of the NVPF was 18 m2/g, and the diameter of the pores was 4nm, respectively. The Asp3 / Asp2 values were measured with Raman spectroscopy, NVP was 0.26, and NVPF was 0.35. TGA showed that the carbon coating amounts of NVP and NVPF were 6.5 wt% and 6.8 wt%, respectively.
In this experiment, NVP has a single charge / discharge plateau at 3.4V with a specific capacity of 94 mAh/g (theoretical capacity of 117.6 mAh/g). And NVPF had three charge discharge plateaus, (A) 3.35V / 3.41V, (B) 3.67V / 3.71V, (C) 4.22V / 4.15V, the capacity was up to 127.68mAh/g (theoretical capacity of 128 mAh/g). Finally, confirmed that the NVPF have better electrochemical performance.

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